The CAP CER 3900PF 63V C0G/NP0 0805 is a type of ceramic capacitor. It has a capacitance value of 3900 pF and operates within a voltage range of 63 volts. The device is manufactured using the C0G or NP0 material, which exhibits stable characteristics over temperature. It comes in an 0805 package, also known as a 2012 metric size.